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EcoWater ECR3702 Series
NSF/ANSI 44 certified residential cation-exchange softener with demand-initiated regeneration and Wi-Fi monitoring.
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Key specifications
- Series
- ECR3702 R30 / R40 / R50S / R70
- Certified flow
- Spec sheet (Rev. B 02/17), gpm @ psi: R30 11 @ 8 · R40 12 @ 13 · R70 12 @ 11. R50S: 20 gpm (NSF listing and owner's manual; not on the sheet)
- Salt efficiency
- At minimum salt dose, gr/lb NaCl. Spec sheet: R30 5,160 · R40 5,150 · R70 5,310. Owner's manual (Rev. E 11/3/17): R30 5,030 · R40 5,030 · R50S 4,800 · R70 5,310
- Hardness capacity
- At maximum salt dose, gr. Spec sheet: R30 30,200 · R40 40,100 · R70 71,500. Owner's manual: R30 27,100 · R40 36,300 · R50S 50,000 · R70 71,500
- Regeneration
- Demand-initiated (patented electronics digital demand module)
- Resin
- Patented Stratified Resin Bed
- Monitoring
- HydroLink Plus Wi-Fi and smartphone app
ApplicationsResidential
Technical overview
Demand-Initiated Softening — Stratified Resin Bed
The ECR3702 (EcoWater 3700 Series Water Conditioner) pairs a patented electronics digital demand module, which captures historical usage patterns to predict future needs for precise regenerations, with a patented stratified resin bed — a layered mix of fine and standard-size resin. A water meter allows chemical feed dosing, flow switch operation and water-use information, and HydroLink Plus Wi-Fi sends alerts for excessive water use, system errors, low salt and service reminders.
Design features (spec sheet)
- Tank
- Multi-wrap fiberglass-reinforced resin tank — the liner will not deteriorate, rust or corrode
- Riser
- Full one-inch riser with self-cleaning distributors, cleaned automatically by water pressure
- Brine valve
- Positive-action brine valve — snap-together construction, no solvents
- Underbedding
- Washed quartz underbedding
- Plumbing connection
- 1 inch
- Salt storage capacity
- 300 lb
Operating limits (R30 / R40 / R70)
- Electrical
- 120 V, 50/60 Hz (24 V DC, 500 mA power supply included)
- Ambient temperature
- 35–150°F / 2–66°C
- Supply water pressure
- 20–125 psi
- Supply water temperature
- 40–120°F / 4–49°C
ECR3702 R30
- Quartz gravel base
- 10 lb
- Certified flow rate
- 11 gpm @ 8 psi
- Stratified resin bed
- 47 lb
- Maximum water hardness
- 60 grains per gallon
- Nominal resin tank size
- 10″ dia. × 35″
- Maximum clear water iron
- 12 ppm-Fe
- Water used per regeneration (approx.)
- 38 gal (at 35 psi)
- Efficiency / capacity (at min / max salt dose)
- 5,160 gr/lb at 1.6 lb; 30,200 gr at 11.0 lb
- Intermittent flow rate (not the rated service flow)
- 16.5 gpm @ 15 psi; 25.8 gpm @ 30 psi
ECR3702 R40
- Quartz gravel base
- 10 lb
- Certified flow rate
- 12 gpm @ 13 psi
- Stratified resin bed
- 63 lb
- Maximum water hardness
- 75 grains per gallon
- Nominal resin tank size
- 10″ dia. × 47″
- Maximum clear water iron
- 15 ppm-Fe
- Water used per regeneration (approx.)
- 51 gal (at 35 psi)
- Efficiency / capacity (at min / max salt dose)
- 5,150 gr/lb at 2.2 lb; 40,100 gr at 14.8 lb
- Intermittent flow rate (not the rated service flow)
- 13.6 gpm @ 15 psi; 21.6 gpm @ 30 psi
ECR3702 R70
- Quartz gravel base
- 12 lb
- Certified flow rate
- 12 gpm @ 11 psi
- Stratified resin bed
- 109 lb
- Maximum water hardness
- 125 grains per gallon
- Nominal resin tank size
- 12″ dia. × 54″
- Maximum clear water iron
- 15 ppm-Fe
- Water used per regeneration (approx.)
- 104 gal (at 35 psi)
- Efficiency / capacity (at min / max salt dose)
- 5,310 gr/lb at 6.2 lb; 71,500 gr at 25.6 lb
- Intermittent flow rate (not the rated service flow)
- 17.0 gpm @ 15 psi; 22.0 gpm @ 30 psi
Best for
Household water softening — the spec sheet sizes the series to household demandHouseholds that want Wi-Fi alerts for excessive water use, low salt and service reminders (HydroLink Plus)
Key product advantages
- Patented electronics digital demand module — usage patterns predict future needs for precise regenerations
- Patented stratified resin bed — a layered mix of fine and standard-size resin for filtration and iron removal without sacrificing flow rate capability, per EcoWater
- HydroLink Plus Wi-Fi alerts, including a water-to-drain sensing alert for excessive water going to drain
- Full one-inch riser with self-cleaning distributors for increased flow rates
- Certified flow rates (11–12 gpm for R30, R40 and R70) verified by NSF, per the spec sheet
Product story
A closer look
